Ni Pxie-5170r Manual

CALIBRATION PROCEDURE

NI PXIe-5170R

This document contains the verification and adjustment procedures for the NI PXIe-5170R

(NI 5170R). Refer to ni.com/calibration for more information about calibration solutions.

Contents

Required Software.....................................................................................................................1

Related Documentation.............................................................................................................2

Test Equipment..........................................................................................................................2

Test Conditions..........................................................................................................................5

Password................................................................................................................................... 6

Calibration Interval................................................................................................................... 6

As-Found and As-Left Limits................................................................................................... 6

Measurement Uncertainty......................................................................................................... 6

Calibration Overview................................................................................................................6

Test System Characterization....................................................................................................7

Zeroing the Power Sensor................................................................................................. 7

Characterizing Power Splitter Amplitude Imbalance....................................................... 7

Verification..............................................................................................................................10

Verifying Timebase Accuracy......................................................................................... 11

Verifying DC Accuracy...................................................................................................12

Verifying AC Amplitude Accuracy.................................................................................14

Verifying Flatness and Bandwidth.................................................................................. 18

Adjustment.............................................................................................................................. 21

Adjusting DC.................................................................................................................. 21

Adjusting Timebase.........................................................................................................22

Reverification..........................................................................................................................23

Updating Verification Date and Time..................................................................................... 23

Worldwide Support and Services............................................................................................ 23

Required Software

Calibrating the NI 5170R requires you to install the following software on the calibration

system:

• LabVIEW Instrument Design Libraries for Reconfigurable Oscilloscopes. The NI 5170R

was first supported in LabVIEW Instrument Design Libraries for Reconfigurable

Oscilloscopes 14.0.

You can download all required software from ni.com/downloads.

Related Documentation

You might find the following documents helpful as you perform the calibration procedure:

•NI PXIe-5170R Getting Started Guide

•NI Reconfigurable Oscilloscopes Help

•NI PXIe-5170R Specifications

The latest versions of these documents are available from ni.com/manuals.

Test Equipment

This section lists the equipment required to calibrate the NI 5170R.

If you do not have the recommended equipment, select a substitute calibration standard using

the specifications listed in the table.

Table 1. NI 5170R Test Equipment

Equipment Recommended

Model

Where Used Minimum Requirements

Oscilloscope

calibrator

Fluke 9500B/600

with Fluke 9530

Active Head

Verifications:

• Timebase

accuracy

• DC accuracy

Adjustments:

• Timebase

• DC

Sine Wave Amplitude:

0.9 Vpk-pk at 11 MHz into

50 Ω

Sine Wave Frequency

Accuracy: 0.25 ppm at

11 MHz

DC Output Range: ±40 mV

to ±2.5 V into 50 Ω

DC Output Accuracy:

±(0.025% of output +

25 µV) into 50 Ω

SMA (m)-to-

BNC (f) adapter

Fairview Microwave

SM4723

Verifications:

• Timebase

accuracy

• DC accuracy

Adjustments:

• Timebase

• DC

Frequency range: DC to

11 MHz

Impedance: 50 Ω

2| ni.com | NI PXIe-5170R Calibration Procedure

Table 1. NI 5170R Test Equipment (Continued)

Equipment Recommended

Model

Where Used Minimum Requirements

DMM NI PXI-4071 Verifications:

• AC amplitude

accuracy

AC voltage accuracy:

±0.1% of reading at 50 kHz

AC Input Range: 0.1 Vpk-pk

to 3.5 Vpk-pk

AC Input Impedance:

≥10 MΩ

Bandwidth: ≥100 kHz

Function

generator

NI PXI-5402 or

Agilent 33220A

Verifications:

• AC amplitude

accuracy

Sine Wave Frequency:

50 kHz

Sine Wave Amplitude

Range: 0.1 Vpk-pk to

3.5 Vpk-pk into 50 Ω

SMA Tee (f-f-f) Fairview Microwave

SM4942

Verifications:

• AC amplitude

accuracy

Impedance: 50 Ω

SMA (m)-to-

SMA (m)

adapter (x2)

Fairview Microwave

SM4960

Test system

characterization

Verifications:

• AC amplitude

accuracy

• Flatness and

bandwidth

Frequency range: DC to

275 MHz

VSWR: <1.05

Impedance: 50 Ω

Double banana

plug to BNC (f)

Pasternak PE9008 Verifications:

• AC amplitude

accuracy

Impedance: 50 Ω

SMA (m)-to-

BNC (m) cable

(x2)

— Verifications:

• AC amplitude

accuracy

Frequency range: DC to

275 MHz

Impedance: 50 Ω

Length: <1 meter

NI PXIe-5170R Calibration Procedure | © National Instruments | 3

Table 1. NI 5170R Test Equipment (Continued)

Equipment Recommended

Model

Where Used Minimum Requirements

Power sensor Rohde & Schwarz

(R&S) NRP-Z91

Test system

characterization

Verifications:

• Flatness and

bandwidth

Range: -15 dBm to 5 dBm

Frequency range: 50 kHz to

275 MHz

Absolute Power Accuracy:

<0.048 dB for <100 MHz,

<0.063 dB for 100 MHz to

275 MHz

Relative Power Accuracy:

<0.022 dB for <100 MHz,

<0.031 dB for 100 MHz to

275 MHz

VSWR: <1.11

Signal generator Rhode & Schwartz

SMA100A

Test system

characterization

Verifications:

• Flatness and

bandwidth

Frequency range: 50 kHz to

275 MHz

Amplitude range: -7 dBm

to 8 dBm

Harmonics: <-30 dBc

Power splitter Aeroflex/Weinschel

1593

Test system

characterization

Verifications:

• Flatness and

bandwidth

Frequency range: 50 kHz to

275 MHz

VSWR: <1.08

Amplitude tracking:

<0.5 dB

50 Ω SMA

terminator (f)

Fairview Microwave

ST1825F

Test system

characterization

Frequency range: DC to

275 MHz

VSWR: <1.05

Impedance: 50 Ω

4| ni.com | NI PXIe-5170R Calibration Procedure

Table 1. NI 5170R Test Equipment (Continued)

Equipment Recommended

Model

Where Used Minimum Requirements

SMA (f)-to-N

(m) adapter

Fairview Microwave

SM4226

Test system

characterization

Verifications:

• Flatness and

bandwidth

Frequency range: DC to

275 MHz

VSWR: <1.05

Impedance: 50 Ω

SMA (f)-to-N (f)

adapter

Fairview Microwave

SM4236

Test system

characterization

Verifications:

• Flatness and

bandwidth

Frequency range: DC to

275 MHz

VSWR: <1.05

Impedance: 50 Ω

Related Information

Verification on page 10

This section provides instructions for verifying the device specifications.

Test Conditions

The following setup and environmental conditions are required to ensure the NI 5170R meets

published specifications:

• The NI 5170R is warmed up for 15 minutes at ambient temperature. Warm-up begins

after the chassis is powered, the device is recognized by the host, and the ADC clock is

configured using either instrument design libraries or the NI-SCOPE device driver.

• Keep cabling as short as possible. Long cables act as antennas, picking up extra noise that

can affect measurements.

• Verify that all connections to the device, including front panel connections and screws,

are secure.

• Use shielded copper wire for all cable connections to the device. Use twisted-pair wire to

eliminate noise and thermal offsets.

• Maintain an ambient temperature of 23 °C ± 3 °C

• Keep relative humidity between 10% and 90%, noncondensing.

• Ensure that the PXI chassis fan speed is set to HIGH, that the fan filters (if present) are

clean, and that the empty slots contain slot blockers and filler panels. For more

NI PXIe-5170R Calibration Procedure | © National Instruments | 5

information about cooling, refer to the Maintain Forced-Air Cooling Note to Users

document available at ni.com/manuals.

• Plug the chassis and the instrument standard into the same power strip to avoid ground

loops.

Password

The default password for password-protected operations is NI.

Calibration Interval

Recommended calibration interval 2 years

As-Found and As-Left Limits

The as-found limits are the published specifications for the NI 5170R. NI uses these limits to

determine whether the NI 5170R meets the device specifications when it is received for

calibration. Use the as-found limits during initial verification.

The as-left calibration limits are equal to the published NI specifications for the NI 5170R, less

guard bands for measurement uncertainty, temperature drift, and drift over time. NI uses these

limits to reduce the probability that the instrument will be outside the published specification

limits at the end of the calibration cycle. Use the as-left limits when performing verification

after adjustment.

Measurement Uncertainty

Measurement uncertainty was calculated in accordance with the method described in ISO

GUM (Guide to the Expression of Uncertainty in Measurement), for a confidence level of

95%. The expressed uncertainty is based on the recommended measurement methodology,

standards, metrology best practices and environmental conditions of the National Instruments

laboratory. It should be considered as a guideline for the level of measurement uncertainty that

can be achieved using the recommended method. It is not a replacement for the user

uncertainty analysis that takes into consideration the conditions and practices of the individual

user.

Calibration Overview

Install the device and configure it in Measurement & Automation Explorer (MAX) before

calibrating.

Calibration includes the following steps:

6| ni.com | NI PXIe-5170R Calibration Procedure

1. Test system characterization—Characterize the amplitude imbalance of the output ports

on your power splitter. The results of this step are used as a correction in the flatness and

bandwidth verification procedure.

2. Verification—Verify the existing operation of the device. This step confirms whether the

device is operating within the published specification prior to adjustment.

3. Adjustment—Perform an external adjustment of the calibration constants of the device.

The adjustment procedure automatically stores the calibration date and temperature on

the EEPROM to allow traceability.

4. Re-verification—Repeat the Verification procedure to ensure that the device is operating

within the published specifications after adjustment.

Refer to the following sections to complete each procedure.

Test System Characterization

The following procedures characterize the test equipment used during verification.

Caution The connectors on the device under test (DUT) and test equipment are

fragile. Perform the steps in these procedures with great care to prevent damaging

any DUTs or test equipment.

Zeroing the Power Sensor

1. Ensure that the power sensor is not connected to any signals.

2. Zero the power sensor using the built-in function, according to the power sensor

documentation.

Characterizing Power Splitter Amplitude Imbalance

This procedure characterizes the amplitude imbalance of the two output ports of the power

splitter over a range of frequencies.

The results of the characterization are later used as a correction in the Verifying Flatness and

Bandwidth procedure.

Table 2. Power Splitter Characterization

Configuration Test Point

Frequency (MHz) Amplitude (dBm)

1 0.05 -0.5

2 50.1 -0.5

3 100.1 -0.5

1. Connect an SMA (f)-to-N (f) adapter to the power sensor. Refer to this assembly as the

power sensor.

2. Zero the power sensor as described in the Zeroing the Power Sensor section.

NI PXIe-5170R Calibration Procedure | © National Instruments | 7

3. Connect the RF OUT connector of the signal generator to the input port of the power

splitter using an SMA (f)-to-N (m) adapter and an SMA (m)-to-SMA (m) cable.

4. Connect an SMA (m)-to-SMA (m) adapter to one of the power splitter output ports. Refer

to this assembly as splitter output 1.

5. Connect the 50 Ω SMA terminator (f) to splitter output 1.

6. Connect the other SMA (m)-to-SMA (m) adapter to the other output port of the power

splitter. Refer to this assembly as splitter output 2.

7. Connect the power sensor to splitter output 2.

The following figure illustrates the hardware setup.

Figure 1. Connection Diagram for Measuring at Splitter Output 2

1. Signal Generator

2. SMA (f)-to-N (m) Adapter

3. SMA (m)-to-SMA (m) Cable

4. Power Sensor

5. SMA (f)-to-N (f) Adapter

6. SMA (m)-to-SMA (m) Adapter

7. Power Splitter

8. 50 Ω SMA Terminator (f)

8. Configure the signal generator to generate a sine waveform with the following

characteristics:

• Frequency: the Test Point Frequency value from the Power Splitter Characterization

table

• Amplitude level: the Test Point Amplitude value from the Power Splitter

Characterization table

8| ni.com | NI PXIe-5170R Calibration Procedure

9. Configure the power sensor to correct for the Test Point Frequency value using the power

sensor frequency correction function.

10. Use the power sensor to measure the power in dBm.

11. Repeat steps 8 through 10 for each configuration in the Power Splitter Characterization

table, recording each result as splitter output 2 power, where each configuration has a

corresponding value.

12. Disconnect the power sensor and 50 Ω SMA terminator (f) from splitter output 2 and

splitter output 1.

13. Connect the power sensor to splitter output 1.

14. Connect the 50 Ω SMA terminator (f) to splitter output 2.

The following figure illustrates the hardware setup.

Figure 2. Connection Diagram for Measuring at Splitter Output 1

6 54 5

7 8

1. Signal Generator

2. SMA (f)-to-N (m) Adapter

3. SMA (m)-to-SMA (m) Cable

4. 50 Ω SMA Terminator (f)

5. SMA (m)-to-SMA (m) Adapter

6. Power Splitter

7. SMA (f)-to-N (f) Adapter

8. Power Sensor

15. Configure the signal generator to generate a sine waveform with the following

characteristics:

• Frequency: the Test Point Frequency value from the Power Splitter Characterization

table

• Amplitude level: the Test Point Amplitude value from the Power Splitter

Characterization table

NI PXIe-5170R Calibration Procedure | © National Instruments | 9

16. Configure the power sensor to correct for the Test Point Frequency value using the power

sensor frequency correction function.

17. Use the power sensor to measure the power in dBm.

18. Repeat steps 15 through 17 for each configuration in the Power Splitter Characterization

table, recording each result as splitter output 1 power, where each configuration has a

corresponding value.

19. Calculate the splitter imbalance for each frequency point using the following equation:

splitter imbalance = splitter output 2 power - splitter output 1 power

20. Disconnect the 50 Ω SMA terminator (f) from splitter output 2. Refer to the remaining

assembly as the power sensor assembly. The power sensor assembly will be used in the

Verifying Flatness and Bandwidth procedure.

Related Information

Verifying Flatness and Bandwidth on page 18

Follow this procedure to verify the analog flatness and bandwidth accuracy of the

NI 5170R by generating a sine wave and comparing the amplitude measured by the

NI 5170R to the amplitude measured by the power sensor.

Verification

This section provides instructions for verifying the device specifications.

Verification of the NI 5170R is complete only after you have successfully completed all tests

in this section using the As-Found Limits.

Refer to the following figure for the names and locations of the NI 5170R front panel

connectors. You can find information about the functions of these connectors in the device

getting started guide.

10 | ni.com | NI PXIe-5170R Calibration Procedure

Figure 3. NI 5170R (4CH) and NI 5170R (8CH) Front Panels

CH 2

CH 3

CH 6

CH 5

CH 4

CH 7

CH 1

CH 0

50Ω

±5V

MAX

AUX I/O

+5V MAX

14-Bit Oscilloscope

NI PXIe-5170R

CH 2

CH 3

CH 1

CH 0

50Ω

±5V

MAX

AUX I/O

+5V MAX

14-Bit Oscilloscope

NI PXIe-5170R

Related Information

Test Equipment on page 2

This section lists the equipment required to calibrate the NI 5170R.

Verifying Timebase Accuracy

Follow this procedure to verify the frequency accuracy of the NI 5170R onboard timebase

using an oscilloscope calibrator.

Table 3. Timebase Accuracy Verification

As-Found Limit As-Left Limit Measurement Uncertainty1

25 PPM 1.6 PPM 0.2 PPM

NI PXIe-5170R Calibration Procedure | © National Instruments | 11

1. Connect the SMA (m)-to-BNC (f) adapter to channel 0 of the NI 5170R.

2. Connect the calibrator test head to the SMA (m)-to-BNC (f) adapter.

3. Configure the NI 5170R with the following settings:

• Bandwidth: Full Bandwidth

• Vertical range: 1 Vpk-pk

• Sample rate: 250 MS/s

• Number of samples: 1,048,576 samples

4. Configure the calibrator and generate a waveform with the following characteristics:

• Waveform: Sine wave

• Amplitude: 0.9 Vpk-pk

• Frequency: 11 MHz

• Load impedance: 50 Ω

5. Enable the calibrator output.

6. Wait 1 second for settling, then measure and record the peak frequency using the Extract

Single Tone Information VI.

7. Calculate the timebase error using the following formula:

Timebase error = (Fmeasured - (11 × 106))/11

8. Compare the timebase error to the appropriate limit from the Timebase Accuracy

Verification table.

Note Timebase verification is only required on one channel.

Verifying DC Accuracy

Follow this procedure to verify the DC accuracy of the NI 5170R by comparing the voltage

measured by the NI 5170R to the value sourced by the voltage standard.

Refer to the following table as you complete the following steps:

1Measurement uncertainty based on Fluke 9500B with Fluke 9530 test head specifications that

apply at Tcal ±5 °C, where Factory Tcal = 23 °C. Uncertainty of the 9500B includes long-term

stability of 1 year (5 years for frequency), temperature coefficient, linearity, load, and line

regulation and traceability of factory and National Calibration Standard.

2Measurement uncertainty based on Fluke 9500B with Fluke 9530 test head specifications that

apply at Tcal ±5 °C, where Factory Tcal = 23 °C. Uncertainty of the 9500B includes long-term

stability of 1 year (5 years for frequency), temperature coefficient, linearity, load, and line

regulation and traceability of factory and National Calibration Standard.

12 | ni.com | NI PXIe-5170R Calibration Procedure

Table 4. DC Accuracy Verification

Config Bandwidth Vertical

Range

(Vpk-pk)

Test

Points

(V)

As-Found

Test Limit

(mV)

As-Left

Test

Limit

(mV)

Measurement

Uncertainty

(mV)2

1 Full Bandwidth 0.2 0.09 ±2.8 ±1.58 ±0.08

2 Full Bandwidth 0.2 -0.09 ±2.8 ±1.58 ±0.08

3 Full Bandwidth 0.4 0.18 ±3.1 ±1.13 ±0.15

4 Full Bandwidth 0.4 -0.18 ±3.1 ±1.13 ±0.15

5 Full Bandwidth 1 0.45 ±6.8 ±1.83 ±0.19

6 Full Bandwidth 1 -0.45 ±6.8 ±1.83 ±0.19

7 Full Bandwidth 2 0.90 ±11.1 ±3.26 ±0.57

8 Full Bandwidth 2 -0.90 ±11.1 ±3.26 ±0.57

9 Full Bandwidth 5 2.25 ±25.6 ±7.15 ±0.61

10 Full Bandwidth 5 -2.25 ±25.6 ±7.15 ±0.61

1. Connect the SMA (m)-to-BNC (f) adapter to channel 0 of the NI 5170R.

2. Connect the calibrator test head to the SMA (m)-to-BNC (f) adapter.

3. Configure the NI 5170R with the following settings:

• Bandwidth: the Bandwidth value from the DC Accuracy Verification table

• Vertical range: the Vertical Range value from the DC Accuracy Verification table

• Sample rate: 250 MS/s

• Number of samples: 1,048,576 samples

4. Configure the calibrator output impedance to 50 Ω.

5. Configure the calibrator to output the Test Point value from the DC Accuracy Verification

table.

6. Enable the calibrator output.

7. Wait 1 second for settling, then compute the average of the samples acquired and record

the measured voltage.

8. Use the following formula to calculate the voltage error:

DC voltage error = Vmeasured - Test Point

9. Compare the voltage error to the appropriate limit from the DC Accuracy Verification

table.

10. Repeat steps 3 through 9 for each configuration listed in the DC Accuracy Verification

table.

NI PXIe-5170R Calibration Procedure | © National Instruments | 13

11. Connect the calibrator test head to channel 1 of the NI 5170R using the SMA (m)-to-

BNC (f) adapter and repeat steps 3 through 9 for each configuration listed in the DC

Accuracy Verification table.

12. Connect the calibrator test head to channel 2 of the NI 5170R using the SMA (m)-to-

BNC (f) adapter and repeat steps 3 through 9 for each configuration listed in the DC

Accuracy Verification table.

13. Connect the calibrator test head to channel 3 of the NI 5170R using the SMA (m)-to-

BNC (f) adapter and repeat steps 3 through 9 for each configuration listed in the DC

Accuracy Verification table.

Note If you are verifying the NI 5170R (8CH), proceed to the following step.

If you are verifying the NI 5170R (4CH), DC accuracy verification is complete.

14. Connect the calibrator test head to channel 4 of the NI 5170R using the SMA (m)-to-

BNC (f) adapter and repeat steps 3 through 9 for each configuration listed in the DC

Accuracy Verification table.

15. Connect the calibrator test head to channel 5 of the NI 5170R using the SMA (m)-to-

BNC (f) adapter and repeat steps 3 through 9 for each configuration listed in the DC

Accuracy Verification table.

16. Connect the calibrator test head to channel 6 of the NI 5170R using the SMA (m)-to-

BNC (f) adapter and repeat steps 3 through 9 for each configuration listed in the DC

Accuracy Verification table.

17. Connect the calibrator test head to channel 7 of the NI 5170R using the SMA (m)-to-

BNC (f) adapter and repeat steps 3 through 9 for each configuration listed in the DC

Accuracy Verification table.

Verifying AC Amplitude Accuracy

Follow this procedure to verify the AC amplitude accuracy of the NI 5170R by comparing the

50 kHz AC voltage measured by the NI 5170R to the 50 kHz AC voltage measured by the

DMM.

Refer to the following table as you complete the following steps:

3Measurement Uncertainty is based on the following equipment and conditions:

• NI PXI-4071 specifications apply after self-calibration is performed, in an ambient

temperature of 23 °C ± 5 °C, with 6.5 digit resolution, a measurement aperture greater than

80 μs, and Auto Zero enabled

• The cable from the BNC Tee to the DMM must be 1 meter or less

• Pasternack SMA Adapter (M-M) PE9069

• Pasternack SMA Tee PE9246

14 | ni.com | NI PXIe-5170R Calibration Procedure

Table 5. AC Amplitude Accuracy Verification

Config Bandwidth Vertical

Range

(Vpk-pk)

DMM

Range

(Vrms)

Test

Point

(Vpk-pk)

Found

Limit

(dB)

As Left

Limit

(dB)

Measurement

Uncertainty

(dB)3

1 Full

Bandwidth

0.2 0.05 0.14 ±0.15 ±0.025 ±0.006

2 Full

Bandwidth

0.4 0.5 0.34 ±0.15 ±0.025 ±0.007

3 Full

Bandwidth

1 0.5 0.70 ±0.15 ±0.025 ±0.006

4 Full

Bandwidth

2 0.5 1.40 ±0.15 ±0.025 ±0.005

5 Full

Bandwidth

5 5.0 3.50 ±0.15 ±0.025 ±0.007

NI PXIe-5170R Calibration Procedure | © National Instruments | 15

Figure 4. AC Verification Test Connections

14-Bit Oscilloscope

NI PXIe-5170R

CH 2

CH 3

CH 6

CH 5

CH 4

CH 7

CH 1

CH 0

50Ω

±5V

MAX

AUX I/O

+5V MAX

ACCESS ACTIVE

SYNC OUT/

PFI 0

PFI 1

NI PXI-540X

REF IN

CH 0

NI PXI-4071

6½-Digit FlexDMM

1 2

6 7 8

1. SMA (m)-to-SMA (m) adapter

2. SMA Tee (f-f-f)

3. SMA (m)-to-BNC (m) cable

4. SMA (m)-to-BNC (m) cable

5. BNC (f) to Double Banana Plug

6. NI 5170R

7. NI 5402

8. DMM

1. Connect the DMM and function generator to channel 0 of the NI 5170R as shown in the

AC Verification Test Connections figure.

2. Configure the DMM with the following settings:

• Function: AC voltage

• Resolution: 6.5 digits

• Min frequency: 49 kHz

• Auto Zero: Enabled

• Range: the DMM Range value from the AC Amplitude Accuracy Verification table

3. Configure the NI 5170R with the following settings:

• Bandwidth: the Bandwidth value from the AC Amplitude Accuracy Verification table

• Vertical range: the Vertical Range value from the AC Amplitude Accuracy

Verification table

• Sample rate: 250 MS/s

• Number of samples: 1,048,576 samples

16 | ni.com | NI PXIe-5170R Calibration Procedure

4. Configure the function generator and generate a waveform with the following

characteristics:

• Waveform: Sine wave

• Amplitude: The Test Point value from the AC Amplitude Accuracy Verification table

• Frequency: 50 kHz

• Load impedance: 50 Ω

Note These values assume you are using a NI 5402 function generator. For

other function generators, the output voltage varies with load output impedance,

up to doubling the voltage for a high impedance load.

5. Wait 1 second for the output of the function generator to settle.

6. Measure and record the amplitude using the Extract Single Tone Information VI for the

NI 5170R.

7. Measure and record the amplitude for the DMM.

Note The Extract Single Tone Information VI returns an amplitude result in

Vpk , but the DMM will return the amplitude as Vrms. Convert the results to the

same unit before calculating error.

8. Calculate the amplitude error using the following formula:

AC Voltage Error = 20 × log10(VNI 5170R Measured/VDMM Measured)

9. Compare the amplitude error to the appropriate Limit from the AC Amplitude Accuracy

Verification table.

10. Repeat steps 2 through 8 for each configuration listed in the AC Amplitude Accuracy

Verification table.

11. Connect the DMM and function generator to channel 1 of the NI 5170R as shown in the

AC Verification Test Connections figure and repeat steps 2 through 9 for each